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/* $OpenBSD: if_athn_cardbus.c,v 1.8 2010/03/27 21:40:13 jsg Exp $ */
/*-
* Copyright (c) 2009 Damien Bergamini <damien.bergamini@free.fr>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* CardBus front-end for Atheros 802.11a/g/n chipsets.
*/
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/timeout.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_amrr.h>
#include <net80211/ieee80211_radiotap.h>
#include <dev/ic/athnreg.h>
#include <dev/ic/athnvar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <dev/cardbus/cardbusvar.h>
struct athn_cardbus_softc {
struct athn_softc sc_sc;
/* CardBus specific goo. */
cardbus_devfunc_t sc_ct;
pcitag_t sc_tag;
void *sc_ih;
bus_size_t sc_mapsize;
pcireg_t sc_bar_val;
int sc_intrline;
pci_chipset_tag_t sc_pc;
};
int athn_cardbus_match(struct device *, void *, void *);
void athn_cardbus_attach(struct device *, struct device *, void *);
int athn_cardbus_detach(struct device *, int);
int athn_cardbus_enable(struct athn_softc *);
void athn_cardbus_disable(struct athn_softc *);
void athn_cardbus_power(struct athn_softc *, int);
void athn_cardbus_setup(struct athn_cardbus_softc *);
struct cfattach athn_cardbus_ca = {
sizeof (struct athn_cardbus_softc),
athn_cardbus_match,
athn_cardbus_attach,
athn_cardbus_detach
};
static const struct pci_matchid athn_cardbus_devices[] = {
{ PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR5416 },
{ PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR5418 },
{ PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR9160 },
{ PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR9280 },
{ PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR9281 },
{ PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR9285 },
{ PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR2427 },
{ PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR9227 },
{ PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR9287 }
};
int
athn_cardbus_match(struct device *parent, void *match, void *aux)
{
return (cardbus_matchbyid(aux, athn_cardbus_devices,
nitems(athn_cardbus_devices)));
}
void
athn_cardbus_attach(struct device *parent, struct device *self, void *aux)
{
struct athn_cardbus_softc *csc = (struct athn_cardbus_softc *)self;
struct athn_softc *sc = &csc->sc_sc;
struct cardbus_attach_args *ca = aux;
cardbus_devfunc_t ct = ca->ca_ct;
bus_addr_t base;
int error;
sc->sc_dmat = ca->ca_dmat;
csc->sc_ct = ct;
csc->sc_tag = ca->ca_tag;
csc->sc_intrline = ca->ca_intrline;
csc->sc_pc = ca->ca_pc;
/* Power management hooks. */
sc->sc_enable = athn_cardbus_enable;
sc->sc_disable = athn_cardbus_disable;
sc->sc_power = athn_cardbus_power;
/* Map control/status registers. */
error = Cardbus_mapreg_map(ct, CARDBUS_BASE0_REG,
PCI_MAPREG_TYPE_MEM, 0, &sc->sc_st, &sc->sc_sh, &base,
&csc->sc_mapsize);
if (error != 0) {
printf(": can't map mem space\n");
return;
}
csc->sc_bar_val = base | PCI_MAPREG_TYPE_MEM;
/* Set up the PCI configuration registers. */
athn_cardbus_setup(csc);
printf(": irq %d", csc->sc_intrline);
athn_attach(sc);
Cardbus_function_disable(ct);
}
int
athn_cardbus_detach(struct device *self, int flags)
{
struct athn_cardbus_softc *csc = (struct athn_cardbus_softc *)self;
struct athn_softc *sc = &csc->sc_sc;
cardbus_devfunc_t ct = csc->sc_ct;
cardbus_chipset_tag_t cc = ct->ct_cc;
cardbus_function_tag_t cf = ct->ct_cf;
athn_detach(sc);
/* Unhook the interrupt handler. */
if (csc->sc_ih != NULL)
cardbus_intr_disestablish(cc, cf, csc->sc_ih);
/* Release bus space and close window. */
Cardbus_mapreg_unmap(ct, CARDBUS_BASE0_REG, sc->sc_st, sc->sc_sh,
csc->sc_mapsize);
return (0);
}
int
athn_cardbus_enable(struct athn_softc *sc)
{
struct athn_cardbus_softc *csc = (struct athn_cardbus_softc *)sc;
cardbus_devfunc_t ct = csc->sc_ct;
cardbus_chipset_tag_t cc = ct->ct_cc;
cardbus_function_tag_t cf = ct->ct_cf;
/* Power on the socket. */
Cardbus_function_enable(ct);
/* Setup the PCI configuration registers. */
athn_cardbus_setup(csc);
/* Map and establish the interrupt handler. */
csc->sc_ih = cardbus_intr_establish(cc, cf, csc->sc_intrline, IPL_NET,
athn_intr, sc, sc->sc_dev.dv_xname);
if (csc->sc_ih == NULL) {
printf("%s: could not establish interrupt at %d\n",
sc->sc_dev.dv_xname, csc->sc_intrline);
Cardbus_function_disable(ct);
return (1);
}
return (0);
}
void
athn_cardbus_disable(struct athn_softc *sc)
{
struct athn_cardbus_softc *csc = (struct athn_cardbus_softc *)sc;
cardbus_devfunc_t ct = csc->sc_ct;
cardbus_chipset_tag_t cc = ct->ct_cc;
cardbus_function_tag_t cf = ct->ct_cf;
/* Unhook the interrupt handler. */
cardbus_intr_disestablish(cc, cf, csc->sc_ih);
csc->sc_ih = NULL;
/* Power down the socket. */
Cardbus_function_disable(ct);
}
void
athn_cardbus_power(struct athn_softc *sc, int why)
{
struct athn_cardbus_softc *csc = (struct athn_cardbus_softc *)sc;
if (why == PWR_RESUME) {
/* Restore the PCI configuration registers. */
athn_cardbus_setup(csc);
}
}
void
athn_cardbus_setup(struct athn_cardbus_softc *csc)
{
cardbus_devfunc_t ct = csc->sc_ct;
cardbus_chipset_tag_t cc = ct->ct_cc;
pci_chipset_tag_t pc = csc->sc_pc;
cardbus_function_tag_t cf = ct->ct_cf;
pcireg_t reg;
/* Program the BAR. */
pci_conf_write(pc, csc->sc_tag, CARDBUS_BASE0_REG,
csc->sc_bar_val);
/* Make sure the right access type is on the cardbus bridge. */
(*cf->cardbus_ctrl)(cc, CARDBUS_MEM_ENABLE);
(*cf->cardbus_ctrl)(cc, CARDBUS_BM_ENABLE);
/* Enable the appropriate bits in the PCI CSR. */
reg = pci_conf_read(pc, csc->sc_tag,
PCI_COMMAND_STATUS_REG);
reg |= PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_MEM_ENABLE;
pci_conf_write(pc, csc->sc_tag, PCI_COMMAND_STATUS_REG,
reg);
/*
* Noone knows why this shit is necessary but there are claims that
* not doing this may cause very frequent PCI FATAL interrupts from
* the card: http://bugzilla.kernel.org/show_bug.cgi?id=13483
*/
reg = pci_conf_read(pc, csc->sc_tag, 0x40);
reg &= ~0xff00;
pci_conf_write(pc, csc->sc_tag, 0x40, reg);
/* Change latency timer; default value yields poor results. */
reg = pci_conf_read(pc, csc->sc_tag, PCI_BHLC_REG);
reg &= ~(PCI_LATTIMER_MASK << PCI_LATTIMER_SHIFT);
reg |= 168 << PCI_LATTIMER_SHIFT;
pci_conf_write(pc, csc->sc_tag, PCI_BHLC_REG, reg);
}
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